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|- style="height:10px"|bgcolor=lightcyan|(a) R<1 >is T-Ring D, wherein T is a valence bond and Ring D is a 5-6 membered aryl or heteroaryl ring; �(b) R<2 >is hydrogen or C1-4 aliphatic and R<2'>is hydrogen; �(c) R<3 >is selected from -R, -OR, or -N(R<4>)2, wherein R is selected from hydrogen, C1-6 aliphatic, 5-6 membered heterocyclyl, phenyl, or 5-6 membered heteroaryl, and L is -O-, -S-, or -NH-; and �(d) Ring D is substituted by up to three substituents selected from -halo, -CN, -NO2, -N(R<4>)2, optionally substituted C1-6 aliphatic group, -OR, -C(O)R, -CO2R, -CONH(R<4>), -N(R<4>)COR, -N(R<4>)CO2R, -SO2N(R<4>)2, -N(R<4>)SO2R, -N(R<6>)COCH2N(R<4>)2, -N(R<6>)COCH2CH2N(R<4>)2, or -N(R<6>)COCH2CH2CH2N(R<4>)2, wherein R is selected from hydrogen, C1-6 aliphatic, phenyl, a 5-6 membered heteroaryl ring, or a 5-6 membered heterocyclic ring